com.google.gerrit.server.patch.diff.ModifiedFilesCache Maven / Gradle / Ivy
// Copyright (C) 2020 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.server.patch.diff;
import com.google.common.collect.ImmutableList;
import com.google.gerrit.server.patch.DiffNotAvailableException;
import com.google.gerrit.server.patch.gitdiff.GitModifiedFilesCache;
import com.google.gerrit.server.patch.gitdiff.GitModifiedFilesCacheImpl;
import com.google.gerrit.server.patch.gitdiff.GitModifiedFilesCacheKey;
import com.google.gerrit.server.patch.gitdiff.ModifiedFile;
/**
* A cache for the list of Git modified files between 2 commits (patchsets) with extra Gerrit logic.
*
* The loader uses the underlying {@link GitModifiedFilesCacheImpl} to retrieve the git modified
* files.
*
*
If the {@link ModifiedFilesCacheKey#aCommit()} is equal to {@link
* org.eclipse.jgit.lib.ObjectId#zeroId()}, the diff will be evaluated against the empty tree, and
* the result will be exactly the same as the caller can get from {@link
* GitModifiedFilesCache#get(GitModifiedFilesCacheKey)}
*/
public interface ModifiedFilesCache {
/**
* Returns the list of {@link ModifiedFile}s between the 2 git commits identified by the key
*
* @param key used to identify two git commits and contains other attributes to control the diff
* calculation.
* @throws DiffNotAvailableException the supplied commits IDs of the key do no exist, are not IDs
* of a commit, or an exception occurred while reading a pack file.
*/
ImmutableList get(ModifiedFilesCacheKey key) throws DiffNotAvailableException;
}